Xiaojun goes back and forth from home to school twice, how many meters does he walk every day? (I walk 70 meters per minute on average and need 12 minutes to get to school)
小军从家到校往返2次，他每天要走多少米？(我平均每分走70米，需要12分到校)
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">70 * 12 * 4</gadget>
<output>3_360</output>

<result>3_360</result>