I do not think that very much is needed here but you may like to have at your disposal the following charts to help you to explore it alongside the children.

360 Legs
Hum	Rat	H/R	R/H
0	90	0
4	88		22
12	84		7
20	80		4
36	72		2
60	60	1	1
90	45	2
108	36	3
120	30	4
140	20	7
144	18	8
150	15	10
156	12	13
160	10	16
162	9	18
168	6	28
170	5	34
172	4	43
174	3	58
176	2	88
178	1	178

420 Legs
Hum	Rat	H/R	R/H
0	105	0
2	104		52
6	102		17
10	100		10
14	98		7
30	90		3
42	84		2
70	70	1	1
126	42	3
140	35	4
150	30	5
168	21	8
180	15	12
182	14	13
190	10	19
196	7	28
198	6	33
200	5	40
204	3	68
206	2	103
208	1	208
210	0		0

480 Legs
Hum	Rat	H/R	R/H
0	120	0
16	112		7
48	96		2
80	80	1	1
120	60	2
144	48	3
160	40	4
180	30	6
192	24	8
200	20	10
208	16	13
210	15	14
216	12	18
220	10	22
224	8	28
228	6	38
230	5	46
232	4	58
234	3	78
236	2	118
238	1	238
240	0		0

540 Legs
Hum	Rat	H/R	R/H
0	135	0
2	134		67
6	132		22
10	130		13
18	126		7
30	120		4
54	108		2
90	90	1	1
162	54	3
180	45	4
210	30	7
216	27	8
234	18	13
240	15	16
250	10	25
252	9	28
258	6	43
260	5	52
264	3	88
266	2	133
268	1	268
270	0		0

600 Legs
Hum	Rat	H/R	R/H
0	150	0
4	148		37
12	144		12
20	140		7
60	120		2
100	100	1	1
150	75	2
180	60	3
200	50	4
240	30	8
250	25	10
260	20	13
270	15	18
276	12	23
280	10	28
288	6	48
290	5	58
292	4	73
294	3	98
296	2	148
298	1	298
300	0		0

660 Legs
Hum	Rat	H/R	R/H
0	165	0
2	164		82
6	162		27
10	160		16
22	154		7
30	150		5
66	132		2
110	110	1	1
198	66	6
220	55	4
264	33	8
270	30	9
286	22	13
300	15	20
308	11	28
310	10	31
318	6	53
320	5	64
324	3	108
326	2	163
328	1	328
330	0		0

720 Legs
Hum	Rat	H/R	R/H
0	180	0
8	176		22
24	168		7
40	160		4
72	144		2
120	120	1	1
180	90	2
216	72	3
240	60	4
270	45	6
280	40	7
288	36	8
300	30	10
312	24	13
320	20	16
324	18	18
330	15	22
336	12	28
340	10	34
342	9	38
344	8	43
348	6	58
350	5	70
352	4	88
354	3	118
356	2	178
358	1	358
360	0		0