Dad spent 603 yuan to buy a microwave oven with a 10% discount. How much is the original price of the microwave oven?
爸爸花603元买回一台打九折到微波炉．微波炉的原价是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">603 / (9/10)</gadget>
<output>670</output>

<result>670</result>