Divide 200 books to Class A and Class B according to the ratio of 5:3, how many books will Class A get?
把200本书按5：3分给甲、乙两个班，甲班分得多少本．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">200 * (5/8)</gadget>
<output>125</output>

<result>125</result>