Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 30b7c59e33c608970e65eb20e63e67f9b2fd61cbbf7f51c098f98db3154699c5:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^