Line 1...three clocks, two of which have a value of 9 each, the other has a value of 3, total 21
Line 2...three same calculators with the display '1234', each display added has a value of 10, total 30
Line 3...three light bulbs with 'five' light lines above each, each light line has a value of 3 (3x5=15) per each bulb
Line 4...clock value is 9, calculator display reads '1224' vice '1234' for a value of 9, now is where the stumper comes in...each of the three bulbs only have 'four' light lines above each bulb (each light line has a value of 3, now each bulb represents a total of 12 per bulb (12x3)
So... 9 + 9 x (12 x 3) = 333
And there you folks have it. I blew it out my ass the first time I tried it quite a while back...second time I hit it.