Sam bought a heavy safe with a combination lock. There were four rows with twenty gold bars per row arranged in the safe. If each gold bar is worth $20000, calculate the total worth of the gold bars in the safe.
If there were four rows of twenty gold bars arranged in the safe, the total number of bars in the safe is 4*20 = <<4*20=80>>80 bars.
Since each gold bar is worth $20000, the 80 bars are worth 80*$20000 = $<<80*20000=1600000>>1,600,000
#### 1600000