(2/3) of number A is equal to (4/5) of number B. It is known that number B is 25. What is the number of A?
甲数的(2/3)与乙数的(4/5)相等，已知乙数是25，求甲数是多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">25 * (6/5)</gadget>
<output>30</output>

<result>30</result>