Xiaohong got all the questions right (9/10), exactly 45 questions, Xiao Hua got all the questions right (24/25), how many questions did Xiao Hua get wrong?
小红做对了全部题的(9/10)，恰好是45道题，小花做对了全部题的(24/25)，小花做错了几道题？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">45 / (9/10)</gadget>
<output>50</output>

<gadget id="calculator">24 / 25</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">50 * (24/25)</gadget>
<output>48</output>

<gadget id="calculator">50 - 48</gadget>
<output>2</output>

<result>2</result>