human
A chair costs 1/7 of the cost of a table. If a table costs $140, how much will it cost to buy a table and 4 chairs?
assistant
How much does one chair cost? ** One chair costs $140 x 1/7 = $<<140*1/7=20>>20.
How much do four chairs cost? ** Four chairs cost $20 x 4 = $<<20*4=80>>80.
How much will it cost to buy a table and 4 chairs? ** So a table and 4 chairs cost $140 + $80 = $<<140+80=220>>220.
#### 220