Xiaoqiang's home is 1.2 kilometers away from the school. He walked 300 meters in 5 minutes. How many minutes will he need to walk to the school at this speed?
小强的家距学校有1.2千米，他用5分钟走了300米，照这样的速度到学校，还需要走几分钟？
<gadget id="calculator">1.2 * 1_000</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 - 300</gadget>
<output>900</output>

<gadget id="calculator">300 / 5</gadget>
<output>60</output>

<gadget id="calculator">900 / 60</gadget>
<output>15</output>

<result>15</result>