In the sixth grade, 500 trees were planted, and 450 survived. How many survived?
六年级植树500棵，活了450棵，活了的占总数的多少．
<gadget id="calculator">450 / 500</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>