There are 20 more tabby cats than white cats, exactly 10% more than white cats. How many tabby cats are there?
花猫的只数比白猫多20只，正好比白猫多10%，花猫有多少只？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">20 / (1/10)</gadget>
<output>200</output>

<gadget id="calculator">200 + 20</gadget>
<output>220</output>

<result>220</result>