In an intelligence test, according to the prescribed scoring standard, 5 points are awarded for correct answers, and 2 points are deducted for wrong answers. A student has answered 100 questions and scored 458 points. How many questions did he answer correctly?
一次智力测验，规定的评分标准，答对得5分，答错扣2分，一个学生答了100道题得了458分，他答对了多少道．
<gadget id="calculator">5 * 100</gadget>
<output>500</output>

<gadget id="calculator">500 - 458</gadget>
<output>42</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">42 / 7</gadget>
<output>6</output>

<gadget id="calculator">100 - 6</gadget>
<output>94</output>

<result>94</result>