Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9e74292d2b111aeef4e073447fb15cb56e1e89657ffe3da644b121c1cf69a6cf:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^