The distance from Xiaogang's home to school is 850 meters. He walks 70 meters per minute. How many meters will he be away from school in 7 minutes?
从小刚家到学校是850米，他每分钟走70米，7分钟后离学校还有多少米．
<gadget id="calculator">70 * 7</gadget>
<output>490</output>

<gadget id="calculator">850 - 490</gadget>
<output>360</output>

<result>360</result>