prompt: Derek finally gets his own allowance. He puts $2 away in January, $4 away in February, $8 away in March, $16 away in April and follows this savings pattern through to December. How much money does he have to spare and save by December?
messages.content: Derek finally gets his own allowance. He puts $2 away in January, $4 away in February, $8 away in March, $16 away in April and follows this savings pattern through to December. How much money does he have to spare and save by December?
messages.role: user
messages.content: Derek doubles his allowance savings each month, so in May, Derek has $16 * 2 = $<<16*2=32>>32.
  In June, Derek has $32 * 2 = $<<32*2=64>>64.
  In July, Derek has $64 * 2 = $<<64*2=128>>128.
  In August, Derek has $128 * 2 = $<<128*2=256>>256.
  In September, Derek has $256 * 2 = $<<256*2=512>>512.
  In October, Derek has $512 * 2 = $<<512*2=1024>>1024.
  In November, Derek has $1024 * 2 = $<<1024*2=2048>>2048.
  By December, Derek has $2048 * 2 = $<<2048*2=4096>>4096 to save.
  #### 4096
messages.role: assistant