Converting written number descriptions to numerical figures involves understanding place value and magnitude. Here are key conversion methods: For simple numbers like Twenty-five thousand three hundred forty-two, identify each part: twenty-five thousand (25,000) + three hundred (300) + forty (40) + two (2) = 25,342. For decimals, place the decimal point in the correct position: Three point seven five equals 3.75. For larger numbers like One million two hundred thousand, break it down: 1,000,000 + 200,000 = 1,200,000. The key is recognizing place values: ones, tens, hundreds, thousands, millions, billions, etc., and combining them correctly to form the final numerical representation.