(2/3) of number A is equal to (3/4) of number B. If number A is 45, what is the number of B?
甲数的(2/3)和乙数的(3/4)相等，若甲数是45，则乙数是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/3) / (3/4)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">45 * (8/9)</gadget>
<output>40</output>

<result>40</result>