Wu Xin's height last year was 147 cm. This year he is taller than last year (1/21). How many centimeters has he grown this year?
吴新去年的身高是147厘米，今年比去年高了(1/21)，今年长高了多少厘米？
<gadget id="calculator">1 / 21</gadget>
<output>1/21 = around 0.047619</output>

<gadget id="calculator">147 * (1/21)</gadget>
<output>7</output>

<result>7</result>