Uncle Li, a professional pig farmer, raised 273 pigs this year, 63 more than last year. How much more pigs this year than last year?
养猪专业户李叔叔今年养猪273头，比去年多养63头，今年养的猪比去年增加了几成？
<gadget id="calculator">273 - 63</gadget>
<output>210</output>

<gadget id="calculator">63 / 210</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>