9999*2=19998, 9999*3=29997, 9999*4=39996, according to the results of the three formulas on the left, write out 9999*5=how much without calculation.
9999*2=19998，9999*3=29997，9999*4=39996，根据左边三个算式的结果，不计算，直接写出9999*5=多少．
<gadget id="calculator">9_999 * 5</gadget>
<output>49_995</output>

<result>49_995</result>