75% of the number A is equal to 15% of the number B. Given that the number A is 80, what is the number B?
甲数的75%与乙数的15%相等，已知甲数是80，乙数是多少？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/4) / (3/20)</gadget>
<output>5</output>

<gadget id="calculator">80 * 5</gadget>
<output>400</output>

<result>400</result>