The distance from Mr. Zhang’s home to Lianshui County Foreign Language Primary School is 900 meters. It takes Mr. Zhang 16 minutes to walk home from get off work, and it takes two minutes longer to get home than to go to school. So how many meters per minute does Mr. Zhang walk back and forth on average?
张老师的家到涟水县外国语小学的路程是900米，张老师下班回家要走16分钟，回家时比上学要多用两分钟，那么张老师往返一趟平均每分钟走多少米？
<gadget id="calculator">16 - 2</gadget>
<output>14</output>

<gadget id="calculator">14 + 16</gadget>
<output>30</output>

<gadget id="calculator">2 / 30</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">900 * (1/15)</gadget>
<output>60</output>

<result>60</result>