A certain type of microwave oven is 360 yuan after a 10% discount. How much is this kind of microwave oven cheaper than the original price after the discount?
某型号微波炉打九折后是360元，这种微波炉打折后比原价要便宜多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">360 / (9/10)</gadget>
<output>400</output>

<gadget id="calculator">400 - 360</gadget>
<output>40</output>

<result>40</result>