Here's a solution in node.js. Can be easily transcribed to other languages:
var paint_per_sqf = 1/350;
var wall_area = 250.0;
var gallons_paint = wall_area * paint_per_sqf;
console.log(wall_area.toFixed(1) + " square feet wall will need:");
console.log(gallons_paint.toFixed(12) + " gallons of paint");
<span>B an idea for an invention that your dad mentioned briefly but did not write down</span>
IT WILL NOT BE 234.6 FOR PF GANG JUST TOOK THE TEST
TRUE, that is a one-sided answer. One of the biggest examples is virtually unhackable blockchains.