Put 7 blue pencils and 3 red pencils in a bag, take out one at a time, and then put it back and continue to touch. If you touch 300 times in this way, how many times will you find red pencils?
把7枝蓝铅笔和3枝红铅笔放在一个包里，每次摸出1枝，然后再放回继续摸，这样摸300次，摸出红铅笔大约有多少次．
<gadget id="calculator">7 + 3</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">300 * (3/10)</gadget>
<output>90</output>

<result>90</result>