Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c66820edb4aa143986097b9ccc3a2a5f804bb04247b0082ba5bbb900babd3ef1:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^