Uncle Wang's family harvests (4/5) tons of wheat this year, which is (1/4) more than last year. How many tons of wheat did Uncle Wang's family harvest last year?
王伯伯家今年收小麦(4/5)万吨，比去年增长(1/4)．王伯伯家去年收小麦多少万吨？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(4/5) / (5/4)</gadget>
<output>16/25 = around 0.64</output>

<result>16/25 = around 0.64</result>