(1/2) of number A (not 0) is equal to (1/3) of number B. Number A is 30. What is the number of B?
甲数(不为0)的(1/2)与乙数的(1/3)相等，甲数是30，乙数是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) / (1/3)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">30 * (3/2)</gadget>
<output>45</output>

<result>45</result>