The survival rate of a certain sapling is between 75% and 80%. If 120 trees are to be planted alive, how many trees should be planted at most.
某种树苗的成活率在75%～80%之间，要种活120棵，至多需要种多少棵树．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<result>160</result>