<human>:  Ethan is reading a sci-fi book that has 360 pages. He read 40 pages on Saturday morning and another 10 pages at night. The next day he read twice the total pages as on Saturday. How many pages does he have left to read?
<bot>: How many pages did Ethan read on Saturday? ** Ethan read a total of 40 pages + 10 pages = <<40+10=50>>50 pages on Saturday.
How many pages did Ethan read on Sunday? ** On the next day, he read a total of 50 pages x 2 = <<50*2=100>>100 pages.
How many pages did Ethan read in total? ** The total number of pages that Ethan had read is 50 pages + 100 pages = <<50+100=150>>150 pages.
How many pages does Ethan have left to read? ** Therefore, Ethan has 360 pages - 150 pages = <<360-150=210>>210 pages left to read.
#### 210