Jeff has 16 GB of storage on his phone. He is already using 4 GB. If a song takes up about 30MB of storage, how many songs can Jeff store on his phone? (There are 1000 MB in a GB).
Jeff has 16-4 = 
<gadget id="calculator">16-4</gadget>
<output>12</output>
12GB left over on his phone.
Therefore, he has 12*1000= 
<gadget id="calculator">12*1000</gadget>
<output>12_000</output>
12,000MB.
Therefore, he can store 12,000/30=
<gadget id="calculator">12000/30</gadget>
<output>400</output>
400 songs.

<result>400</result>