Aunt Wang typed 350 words for 5 points. According to this calculation, how many points does she need to type 840 words?
王阿姨5分打字350个，照这样计算，她打840个字需要多少分．
<gadget id="calculator">350 / 5</gadget>
<output>70</output>

<gadget id="calculator">840 / 70</gadget>
<output>12</output>

<result>12</result>