The number of trees planted by Tianshan Forest Farm last year was 40% more than the number of surviving trees in the previous year. The survival rate of last year was 80%.
天山林场去年植树的数量比前年成活的树木多40%，去年的成活率是80%，去年成活的树木数量是前年成活树木的多少
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(7/5) * (4/5)</gadget>
<output>28/25 = around 1.12</output>

<result>28/25 = around 1.12</result>