Plant a batch of saplings, the number of unplanted saplings is the number of surviving trees (1/49), what is the survival rate?
种植一批树苗，没种活的棵数是成活棵数的(1/49)，成活率是多少．
<gadget id="calculator">1 + 49</gadget>
<output>50</output>

<gadget id="calculator">49 / 50</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>