Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1b7a504a8773e425d42fe4f08e8c280139ea2b1c4fa671d12dc094bc87a8d900:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^