An ice cream factory makes 100 quarts of chocolate ice cream in 2 hours.  It can make 50 quarts of vanilla ice cream in 4 hours.  How many quarts in total would be made in 48 hours?
Chocolate ice cream can be made at 100 quarts / 2 hours = 
<gadget id="calculator">100/2</gadget>
<output>50</output>
50 quarts per hour.
Vanilla ice cream can be made at 50 quarts / 4 hours = 
<gadget id="calculator">50/4</gadget>
<output>25/2 = around 12.5</output>
12.5 quarts per hour.
In 48 hours there would be 48 * 50 quarts = 
<gadget id="calculator">48*50</gadget>
<output>2_400</output>
2400 quarts of chocolate ice cream.
In 48 hours there would be 48 * 12.5 quarts = 
<gadget id="calculator">48*12.5</gadget>
<output>600</output>
600 quarts of vanilla ice cream.
Combined there would be 2400 chocolate + 600 vanilla = 
<gadget id="calculator">2400+600</gadget>
<output>3_000</output>
3000 quarts of ice cream.

<result>3_000</result>