How do you display a result in a JavaScript quiz

I have to write a quiz for my digital tech class using JavaScript. But I don’t know how to show the result that the user got on it.
This is my quiz so far.

1 / 4
Question: “22 x 9”,
answers:
a: “180”,
b: “98”,
c: “109”,
d: "198”

 Correct Answer: "d"

Question: “9 - 11”,
answers:
a: “2”,
b: “-2”,
c: “5”,
d: “3”

 Correct Answer: "b"

Question: “7 x 8”,
answers:
a: “51”,
b: “60”,
c: “56”,
d: “54”

 Correct Answer: "c"
   
 question: "99 x 9",  
 answers:  
   a: "891",  

2 / 4
b: “900”,
c: “890”,
d: “871”

 Correct Answer: "a"
 
 question: "100 + 72",  
 answers:  
   a: "171",  
   b: "72",  
   c: "100",  
   d: "172"  
 
 Correct Answer: "d"
 
 question: "10 x 99",  
 answers:  
   a: "999",  
   b: "900",  
   c: "990",  
   d: "1000"  
   
 Correct Answer: "c”

function mathquiz() {
var qn1 = prompt("[22 x 9] a. 180 b. 98 c. 109 d. 198");
if (qn1 == “d”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
3 / 4
}
var qn2 = prompt("[9 - 11] a. 2 b. -2 c. 5 d. 3 “);
if (qn2 == “b”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
}
var qn3 = prompt(”[7 x 8] a. 51 b. 60 c. 56 d. 54");
if (qn3 == “c”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
}
var qn4 = prompt("[99 x 9] a. 891 b. 900 c. 890 d. 871");
if (qn4 == “a”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
}
var qn5 = prompt("[100 + 72] a. 171 b. 72 c. 100 d. 172");
if (qn5 == “d”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
}
var qn6 = prompt("[10 x 99] a. 999 b. 900 c. 990 d. 100");
if (qn6 == “c”){
alert(“That is correct!”);
} else {
alert(“That is incorrect!”);
}
4 / 4
}

mathquiz()