Xiaoqiao and Xiaopang walk with their backs from a certain place at the same time. Xiaopang walks 60 meters per minute, and Xiaoqiao walks 100 meters per minute. After walking for a minute, Xiaoqiao turns around and chases after Xiaopang. How many minutes does it take to catch up? Fatty.
小巧和小胖两人两人同时从某地背向而行，小胖每分钟行60米，小巧每分钟行100米，行了一分钟后，小巧转身去追小胖，需要多少分钟追上小胖．
<gadget id="calculator">60 + 100</gadget>
<output>160</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">160 * (1/40)</gadget>
<output>4</output>

<result>4</result>