Xiaohong called one of his classmates, but he only remembered the first 7 digits, and couldn't remember the 8th digit. Think about it, how likely is it that she dialed the correct number?
小红给他的一位同学打电话，可他只记住了前7位数字，第8位数字记不清楚，想一想，她拨对电话号码的可能行是多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>