The number of boys in the fifth grade is the number of girls (4/3), and the number of the whole grade in the fifth grade is the number of boys.
五年级男生为数是女生人数的(4/3)，五年级全年级人数是男生人数的多少．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 * (4/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 + (4/3)</gadget>
<output>7/3 = around 2.333333</output>

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

<result>7/4 = around 1.75</result>