The difference between the number of students in the two schools is 400, the number of students in school A (2/5) is equal to the number of students in school B (10/17), how many people are there in the two schools?
两所学校人数相差400人，甲校人数的(2/5)等于乙校人数的(10/17)，两校共多少人．
<gadget id="calculator">10 / 17</gadget>
<output>10/17 = around 0.588235</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(10/17) / (2/5)</gadget>
<output>25/17 = around 1.470588</output>

<gadget id="calculator">(25/17) - 1</gadget>
<output>8/17 = around 0.470588</output>

<gadget id="calculator">400 / (8/17)</gadget>
<output>850</output>

<gadget id="calculator">850 + 450</gadget>
<output>1_300</output>

<result>1_300</result>