In a classroom, 10 children have 7 books each. Their teacher brings another 8 books to the classroom. How many books are in the classroom altogether?
At first, the children have 10*7=
<gadget id="calculator">10*7</gadget>
<output>70</output>
70 books.
With their teacher, they have 70+8=
<gadget id="calculator">70+8</gadget>
<output>78</output>
78 books.

<result>78</result>