Jo has been making face masks. She can make 4 small masks with 2 yards of material and 3 large masks with 2.25 yards of material. How much material would she need to make 20 small and 8 large masks for her class?
It takes 2 yards of material / 4 small masks = 
<gadget id="calculator">2/4</gadget>
<output>1/2 = around 0.5</output>
0.5 yards of material per mask.
It takes 2.25 yards of material / 3 large masks = 
<gadget id="calculator">2.25/3</gadget>
<output>0.75</output>
0.75 yards of material per mask.
For the small masks, it will take 20 masks x 0.5 yards = 
<gadget id="calculator">20*0.5</gadget>
<output>10</output>
10 yards of material.
For the large masks, it will take 8 masks x 0.75 yards = 
<gadget id="calculator">8*0.75</gadget>
<output>6</output>
6 yards of material.
In all, it will take 10 yards + 6 yards = 
<gadget id="calculator">10+6</gadget>
<output>16</output>
16 yards of material.

<result>16</result>