The certain amount of salt in 10 liters (L) of salt water is 7/10. If you divide the salt water equally into 4 cups, how many liters of salt are in each cup?
10 7/10 [OP_MUL] 4 [OP_DIV]
var_a = 10
var_b = 0.7
var_c = var_a * var_b
var_d = 4
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))