When you multiply decimals and whole numbers you have to find out how many numbers are behind the decimal, in this case there are two in the number 1.34. So once you know this you will know how many places to move your decimal over in the first answer where both numbers being multiplied are whole numbers. so you answer would be 48.24
The dots next to the seven are another way to write multiplication. So, 7 times 7 times 7 times 7 is another way of seven 7 to the fourth power, which equals 2401