Meso can type 15 pages in 5 minutes. Tyler can type the same 15 pages in 3 minutes.  How many minutes would it take Meso and Tyler to type 40 pages working together?
Meso types 15 pages / 5 minutes = 
<gadget id="calculator">15/5</gadget>
<output>3</output>
3 page per minute.
Tyler types 15 pages / 3 minutes = 
<gadget id="calculator">15/3</gadget>
<output>5</output>
5 pages per minute.
Together they can type 3 + 5 = 
<gadget id="calculator">3+5</gadget>
<output>8</output>
8 pages per minute.
Working together, it would take them 40 pages / 8 pages per minute = 
<gadget id="calculator">40/8</gadget>
<output>5</output>
5 minutes.

<result>5</result>