In the orchard of Grandpa Li's house, 300 pear trees were newly planted, and 270 survived. What is the survival rate of these pear trees?
李爷爷家的果园里新栽了300棵梨树，成活了270棵，这些梨树的成活率是多少．
<gadget id="calculator">270 / 300</gadget>
<output>9/10 = around 0.9</output>

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

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>