Spanish Sub Too Heavy Thanks to Math Mistake

Spanish Sub Too Heavy Thanks to Math Mistake | TheLedger.com:
"A new, Spanish-designed submarine has a weighty problem:
The vessel is more than 70 tons too heavy, and officials fear if it goes out to sea, it will not be able to surface.
And a former Spanish official says the problem can be traced to a miscalculation — someone apparently put a decimal point in the wrong place."