There is a bag of peanuts, 45 kilograms are taken out for the first time, and the rest (4/5) is taken out for the second time. At this time, there are 45 kilograms left in the bag. How many kilograms are there in this bag of peanuts?
有一袋花生，第一次取出45千克，第二次取出剩下的(4/5)，这时袋子里剩下45千克，这袋花生原来有多少千克？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">45 / (1/5)</gadget>
<output>225</output>

<gadget id="calculator">225 + 45</gadget>
<output>270</output>

<result>270</result>