Turtle Dig

function split(inputstr, sep)
        if sep == nil then
                sep = "%s"
        end
        local t={}
        for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
                table.insert(t, str)
        end
        return t
end

print("Please input X, Y, and Z:")
local tempString = split(read(),' ')
x,y,z = tonumber(tempString[1]),tonumber(tempString[2]),tonumber(tempString[3])
print("X: ".. x)
print("Y: ".. y)
print("Z: ".. z)

print("Total number of energy for this dig: ".. x*y*z .." You would need ".. (x*y*z)/80 .." coal for this dig. Please insert at least one coal in the fourth slot to begin.")