 
 <prompt> Johnny na engineer wey dey design bridge. The top of the bridge wey be the roadway deck need 1600 tons of concrete to build. The two bridge anchors need equal amount of concrete, but only one don dey built so far, wey dem use 700 tons of concrete. Johnny come calculate how many tons of concrete the supporting pillars underneath the bridge go need, and e find say the total amount of concrete wey dey the whole bridge go be 4800 tons. How much concrete Johnny find say e need for the supporting pillars? <response>: ```Di bridge anchors go need 700 * 2 = 1400 tons of concrete.
Di roadway deck and bridge anchors go need 1600 + 1400 = 3000 tons of concrete.
So, Johnny see say di supporting pillars go need 4800 - 3000 = 1800 tons of concrete.

Di answer go be 1,800.``` 