a = 12
b = 7.4
c = 1
a -= b
print(a, b)
a *= 2 + c
print(a)
b += a * c
print(b)
# Output
4.6 7.4
13.79999999999999999
21.2
a = 12
b = 7.4
c = 1
a -= b
print(a, b)
a *= 2 + c
print(a)
b += a * c
print(b)
# Output
4.6 7.4
13.79999999999999999
21.2