Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b4f30a69d96c23a61c313875bef43a461d38137911eb5b1428ba1e386cfe70cd:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^