Xiaomin bought a remote control car, gave his aunt 50 yuan, and got back 13 yuan. How much is a remote control car?
小民买了一辆遥控车，给阿姨50元，找回了13元，一辆遥控车多少钱？
<gadget id="calculator">50 - 13</gadget>
<output>37</output>

<result>37</result>