Xiaoya and her mother went to the supermarket, and her mother bought two barrels of refined oil with a unit price of 75.8 yuan, and Xiaoya bought a copy of "Journey to the West" for 18.5 yuan. Mom paid 200 yuan, how much should I get back?
小亚和妈妈去超市，妈妈买了单价是75.8元的两桶精制油，小亚买了一本18.5元的《西游记》．妈妈付出200元，应找回多少元？
<gadget id="calculator">75.8 * 2</gadget>
<output>151.6</output>

<gadget id="calculator">151.6 + 18.5</gadget>
<output>170.1</output>

<gadget id="calculator">200 - 170.1</gadget>
<output>29.9</output>

<result>29.9</result>