I'm assuming this a joke question, but in case it's not...
How do you listen to music over the radio? Lot's of math involved + calculus.
How can you tell how fast your car is going? Calculus!
How do you think your videogames work? Lot's of complex algorithms and math.
How can you predict how much money a company would earn?
You know that thing you used to post that question? Like you know, that computer? How does it work?
There are so many practical applications of math... without math this world will be in flames and civil war.