# print(1 + 2/3 + 3 + 4/5 - 7)

x = 2/3
print("10x = ", 10 * x )
print("9x = ", 9*x)
print("10x - 9x = ", 10*x - 9*x)
print("x = ", x)

print("-----------------------------")

y = 4/9
print(y)
print( 10 *y )
print(9*y)

print("-----------------------------")