(2/3) of number A is equal to (4/9) of number B, number A is 60, what is the number of B.
甲数的(2/3)等于乙数的(4/9)，甲数是60，乙数是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(2/3) / (4/9)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 * (3/2)</gadget>
<output>90</output>

<result>90</result>