Most Expensive math error. Someone put a decimal point in wrong place, Spain’s submarines S-80 facing weight imbalance problem. It was discovered about 100 tons heavier than it needed to be. It mistake cost a reported 2.2 billion euro that buoyancy could be improved by lengthening the boat. It got delayed for another 7 years. Cost overruns to fix that is 2.2 billions euro

Kapal selam ini dijadual memulakan perkhidmatan pada 2015