Heshan Village originally planned to afforest 16 mu last year, but the actual afforestation was 20 mu. The actual afforestation was much more than the original plan.
河山村去年原计划造林16亩，实际造林20亩，实际造林比原计划多多少．
<gadget id="calculator">20 - 16</gadget>
<output>4</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>