(1/3) of the number A is equal to (2/5) of the number B. The number B is 45. What is the number A?
甲数的(1/3)和乙数的(2/5)相等，乙数是45，甲数是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) / (1/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">45 * (6/5)</gadget>
<output>54</output>

<result>54</result>