C224

In addition, three small pulleys fell out of the drainpipe. Lu Xiaoyun saw this and smiled, then he picked up the pieces and put them together, "Hang two of them on the tripod to make the static pulleys and the other one to make the pulleys. Combine them and they can lift two bodies weighing more than 200 pounds with only 70 kilograms of lead."

And so it was solved