39198

1 step

1 1

2 steps

11
2 2

3 steps
111
12 21 3

4 steps

1111
112 211 121
22 5

5 steps

11111
1112 1121 1211 2111
221 122 212 8

6 steps
111111
21111 12111 11211 11121 11112
2211 2121 1221 2112 1212 1122
222

13

1+2=3
3+5=8
8+5=13

The two number added together equals the number you are trying to find

13+8=21
21+13=34
34+21=55
55+34=89
89+55=144
144+89=233
233+144=377

377 is the answer