Xiao Tao and Xiao Jun practice running. Xiao Tao runs 7 meters per second, and Xiao Jun runs 6 meters per second. The two are heading in the same direction from the same place. Xiaojun runs for 30 seconds first. How many minutes will it take for Xiaotao to catch up with Xiaojun? (Solution by equation).
小涛和小军俩人练习跑步，小涛每秒跑7米，小军每秒跑6米．两人从同一地点向同一方向前进，小军先跑30秒，多少分钟后小涛追上小军？(用方程解)．
<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<gadget id="calculator">180 / 1 / 60</gadget>
<output>3</output>

<result>3</result>