There are two male and female dormitory buildings in a middle school, which are 300 meters apart. There are 300 students in the male building and 200 students in the female building. The sum of the distances from the students in the female building to the cafeteria is equal to the sum of the distances from the students in the male building to the cafeteria.
某中学有两栋男、女宿舍楼，相距300米，男生楼有300人，女生楼有200人，现在要在两楼之间盖一座食堂，那么当食堂距男生楼多少米处时，可使女生楼的同学到食堂距离之和等于男生楼同学到食堂的距离之和．
<gadget id="calculator">200 * 300</gadget>
<output>60_000</output>

<gadget id="calculator">60_000 + 0</gadget>
<output>60_000</output>

<gadget id="calculator">300 + 200</gadget>
<output>500</output>

<gadget id="calculator">60_000 / 500</gadget>
<output>120</output>

<result>120</result>