My mother went to the vegetable market with Aunt Wang next door and bought 5 kilograms of hairtail. At that time, my mother paid 50 yuan and got 10 yuan back. After returning, Aunt Wang asked for 2 kilograms, and she also gave her mother 50 yuan. How much should her mother give her?
妈妈和隔壁的王阿姨一块逛菜场，买了5千克带鱼，当时妈妈付了50元，找回10元．回来以后，王阿姨要了2千克，她也给了妈妈50元，妈妈应该找给她多少钱？
<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">50 - 16</gadget>
<output>34</output>

<result>34</result>