The price of a commodity is reduced by 20% for the first time, and the price is reduced by 20% for the second time. If the original price needs to be restored now, how much should the price be increased on the basis of the price after the second price reduction. (fill in the score)
某种商品第一次降价20%，第二次又降价20%，若现在需要恢复原价，则在第二次降价后价格的基础上应提价多少．(填分数)
<gadget id="calculator">1 - 0.64</gadget>
<output>0.36</output>

<gadget id="calculator">0.36 / 0.64</gadget>
<output>0.5625</output>

<result>0.5625</result>