x = 10
y = 20
z = 30
area = (x*y + y*z + z*x) * 2
volume = x * y * z
print "表面积=", area, "\n"
print "体积=", volume, "\n"
print "表面积 = #{area}\n"
puts "表面积 = #{area}" 这样写都可以
x = 10
y = 20
z = 30
area = (x*y + y*z + z*x) * 2
volume = x * y * z
print "表面积=", area, "\n"
print "体积=", volume, "\n"
print "表面积 = #{area}\n"
puts "表面积 = #{area}" 这样写都可以