In one hour, Ezra read twice as many books as Ahmed. Ezra has read 300 books this hour and decided to read 150 more. How many books have they read altogether?
If Ezra has read 300 books this hour and decided to read 150 more in the next hour, he has read a total of 300+150=
<gadget id="calculator">300+150</gadget>
<output>450</output>
450.
Since Ezra reads twice as many books as Ahmed, Ahmed has read 450/2=
<gadget id="calculator">450/2</gadget>
<output>225</output>
225 books.
Together, Ahmed and Ezra has read 225+450=
<gadget id="calculator">225+450</gadget>
<output>675</output>
675 books.

<result>675</result>