B minus A equals 211.5. Multiplying the decimal number A by 10 equals B. Calculate A, including the decimal point.
211.5 10 1 [OP_SUB] [OP_DIV]
var_a = 211.5
var_b = 10
var_c = 1
var_d = var_b - var_c
var_e = var_a / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))