There is a bag of grapes with a water content of 99%. After a period of time, it loses 5kg and the water content drops to 98%. Find the weight of the grapes at this time.
有一袋葡萄，其含水量为99%，过段时间后减轻了5kg，含水率也降为98%，求这时葡萄的重量．
<gadget id="calculator">99 / 100</gadget>
<output>99/100 = around 0.99</output>

<gadget id="calculator">1 - (99/100)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(99/100) / (1/100)</gadget>
<output>99</output>

<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">1 - (49/50)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(49/50) / (1/50)</gadget>
<output>49</output>

<gadget id="calculator">99 - 49</gadget>
<output>50</output>

<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / (1/50)</gadget>
<output>5</output>

<result>5</result>