Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc821861e1cce2ddf858e93e6e27722abf5472001fe1224c06122f86ccc5b025:17:16
   |
17 |         } else {let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I2B1;let f2 = fee * I2 / scale + feefee*B2/scale;res = f1*scale/f2;}
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^