Can you identify any specific mathematical problems or calculations present in the image?

The image contains several long division problems. For example, one problem appears to be \( 1897252 \div \text{a three-digit number} \), another is \( 9828364 \div \text{a three-digit number} \), and \( 17220492 \div \text{a three-digit number} \). Other visible calculations include \( 51957753 \div \text{a three-digit number} \), \( 77044374 \div \text{a three-digit number} \), \( 138764452 \div \text{a three-digit number} \), \( 35870.4752 \div \text{a three-digit number} \), \( 3003000924 \div \text{a three-digit number} \), and \( 2572560397 \div \text{a three-digit number} \). There are also intermediate steps and subtractions shown for each division.