use STA to print a number.

project.c

#include "sketchbook.h"

void setup() {
}

void draw() {
  int result = 77; // this would be your solution
  // use the following code to output the result
  char buffer[100];
  sprintf(buffer, "%i", result);
  text(10, 10, buffer);
  // stop draw from being called again and again
  stop();
}