Zhuzhu bought a second-hand electric toy car and paid 90% of the original price of the electric toy car. After a few days, his friend Yang Yang took a fancy to this electric toy car and expressed his willingness to pay 25% more than the original price. Price to buy. Zhuzhu agreed, and only needs to change hands, Zhuzhu can earn 70 yuan. So how much is the original price of this electric toy car?
猪猪同学买了一个二手的电动玩具车，支付了电动玩具车原价的90%，没过几天，他的朋友羊羊看中了这个电动玩具车，并且表示愿意支付高于原价25%的价格购买．猪猪答应了，只需要一转手，猪猪就可以赚70元．那么这个电动玩具车的原价是多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(1/4) - (9/10)</gadget>
<output>-13/20 = around -0.65</output>

<gadget id="calculator">1 + (-13/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">70 / (7/20)</gadget>
<output>200</output>

<result>200</result>