There are 140 members in the chorus, boys account for 3/4 of the girls, how many girls are there in the chorus? (column equation solution)
合唱队有140人，男生占女生的(3/4)，合唱队女生有多少人？(列方程解答)
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">140 / (7/4)</gadget>
<output>80</output>

<result>80</result>