If (4/3)a=(3/4)b, b=80. Then a=how much.
如果(4/3)a=(3/4)b，b=80．那么a=多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 80</gadget>
<output>60</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 / (4/3)</gadget>
<output>45</output>

<result>45</result>