There are 176 boys and 117 girls in the whole grade. Each person distributes 3 math exercise books, how many math exercise books should the teacher prepare?
全年级有176名男生，117名女生．每人发3本数学练习本，老师应该准备多少本数学练习本？
<gadget id="calculator">176 + 117</gadget>
<output>293</output>

<gadget id="calculator">293 * 3</gadget>
<output>879</output>

<result>879</result>