At noon on Sunday, Teacher Zhou called and asked Teacher Li to go to a restaurant for dinner, so the two of them started from home at the same time and walked towards each other. Teacher Zhou walked 20 meters per minute, and Teacher Li walked 17 meters per minute. 12 meters, how many meters are there between the two of them?
星期天中午，周老师打电话约李老师到一家饭馆吃饭，于是他们两人同时从家出发相向而行，周老师每分钟步行20米，李老师每分钟步行17米，两人相遇时距中点12米，他们两家相距多少米？
<gadget id="calculator">20 - 17</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">20 + 17</gadget>
<output>37</output>

<gadget id="calculator">12 * (2/3) * 37</gadget>
<output>296</output>

<result>296</result>